Is it possible to observe significant changes when enabled HTTP2?

Dear Friends,
Can anyone help me with this?
Today I have activated HTTP/2 Push for CSS and JS. How can it be possible to observe the changes in site load time?
Note: Activated using LiteSpeed WordPress Plugin.

FCP might be quick.

I have tested with Google Page Speed and it remains same.
No changes., is there any other way to check the impact?